﻿using System;

/* Copyright (c) 2010 CBaxter
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
 * IN THE SOFTWARE. 
 */

namespace Xpedite.Resources.Compressors
{
  internal struct AcceptEncoding
  {
    private readonly String _coding;
    private readonly Single _q;

    public String Coding { get { return _coding; } }
    public Single Q { get { return _q; } }

    public AcceptEncoding(String coding, Single quality)
    {
      Verify.NotWhiteSpace(coding, "coding");

      _coding = coding;
      _q = quality;
    }

    public static AcceptEncoding Parse(String value)
    {
      Verify.NotWhiteSpace(value, "value");

      Int32 semiColonIndex = value.IndexOf(';');
      String coding = (semiColonIndex < 0 ? value : value.Substring(0, semiColonIndex)).Trim();

      Int32 equalIndex = value.IndexOf('=');
      Single q = equalIndex < 0 ? 1 : Math.Min(1, Math.Max(0, Single.Parse(value.Substring(equalIndex + 1).Trim())));

      return new AcceptEncoding(coding, q);
    }
  }
}
